[PATCH 2/2] drm/panel: Add TSD TST070WSBE-196C 7" DSI panel driver
From: William Bright
Date: Mon Apr 27 2026 - 11:35:01 EST
Add a dedicated panel driver for the TSD TST070WSBE-196C, a 7" 1024x600
MIPI-DSI TFT LCD panel using an EK79007AD controller.
The driver supports power supply control, reset and enable GPIOs, and
the backlight framework.
The initial driver was built mostly using
"linux-mdss-dsi-panel-driver-generator" [1], reading the downstream
file "dsi-panel-imdt-tst070wsbe165c-video.dtsi" [2].
[1] https://github.com/msm8916-mainline/linux-mdss-dsi-panel-driver-generator
[2] https://raw.githubusercontent.com/imd-tec/meta-imdt-qcom/refs/heads/kirkstone/recipes-display/displaydevicetree/displaydevicetree/0001-Initial-bringup-of-IMDT-Display-3.patch
Signed-off-by: William Bright <william.bright@xxxxxxxxxxx>
---
MAINTAINERS | 6 +
drivers/gpu/drm/panel/Kconfig | 9 ++
drivers/gpu/drm/panel/Makefile | 1 +
drivers/gpu/drm/panel/panel-tsd-tst070wsbe-196c.c | 168 ++++++++++++++++++++++
4 files changed, 184 insertions(+)
diff --git a/MAINTAINERS b/MAINTAINERS
index ae8a01f30ff4..6e80d9916a10 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -8414,6 +8414,12 @@ T: git https://gitlab.freedesktop.org/drm/misc/kernel.git
F: Documentation/devicetree/bindings/display/panel/tpo,tpg110.yaml
F: drivers/gpu/drm/panel/panel-tpo-tpg110.c
+DRM DRIVER FOR TSD TST070WSBE-196C PANEL
+M: William Bright <william.bright@xxxxxxxxxxx>
+S: Maintained
+F: Documentation/devicetree/bindings/display/panel/tsd,tst070wsbe-196c.yaml
+F: drivers/gpu/drm/panel/panel-tsd-tst070wsbe-196c.c
+
DRM DRIVER FOR USB DISPLAYLINK VIDEO ADAPTERS
M: Dave Airlie <airlied@xxxxxxxxxx>
R: Sean Paul <sean@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index d6863b28ddc5..aef00b43c1f1 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -1227,6 +1227,15 @@ config DRM_PANEL_TRULY_NT35597_WQXGA
Say Y here if you want to enable support for Truly NT35597 WQXGA Dual DSI
Video Mode panel
+config DRM_PANEL_TSD_TST070WSBE_196C
+ tristate "TSD TST070WSBE-196C DSI panel"
+ depends on OF
+ depends on DRM_MIPI_DSI
+ depends on BACKLIGHT_CLASS_DEVICE
+ help
+ Say Y here if you want to enable support for the TSD TST070WSBE-196C
+ 1024x600 7" MIPI DSI panel with an EK79007AD controller.
+
config DRM_PANEL_VISIONOX_G2647FB105
tristate "Visionox G2647FB105"
depends on OF
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index a4291dc3905b..1653fe7b45c5 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -121,6 +121,7 @@ obj-$(CONFIG_DRM_PANEL_TPO_TD028TTEC1) += panel-tpo-td028ttec1.o
obj-$(CONFIG_DRM_PANEL_TPO_TD043MTEA1) += panel-tpo-td043mtea1.o
obj-$(CONFIG_DRM_PANEL_TPO_TPG110) += panel-tpo-tpg110.o
obj-$(CONFIG_DRM_PANEL_TRULY_NT35597_WQXGA) += panel-truly-nt35597.o
+obj-$(CONFIG_DRM_PANEL_TSD_TST070WSBE_196C) += panel-tsd-tst070wsbe-196c.o
obj-$(CONFIG_DRM_PANEL_VISIONOX_G2647FB105) += panel-visionox-g2647fb105.o
obj-$(CONFIG_DRM_PANEL_VISIONOX_RM69299) += panel-visionox-rm69299.o
obj-$(CONFIG_DRM_PANEL_VISIONOX_RM692E5) += panel-visionox-rm692e5.o
diff --git a/drivers/gpu/drm/panel/panel-tsd-tst070wsbe-196c.c b/drivers/gpu/drm/panel/panel-tsd-tst070wsbe-196c.c
new file mode 100644
index 000000000000..7b639728b3bf
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-tsd-tst070wsbe-196c.c
@@ -0,0 +1,168 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Generated with linux-mdss-dsi-panel-driver-generator from vendor device tree.
+ * Copyright (c) 2026 IMD Technologies Ltd <william.bright@xxxxxxxxxxx>
+ */
+
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/regulator/consumer.h>
+
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_probe_helper.h>
+
+struct tst070wsbe_196c {
+ struct drm_panel panel;
+ struct mipi_dsi_device *dsi;
+ struct regulator *supply;
+ struct gpio_desc *reset_gpio;
+};
+
+static inline struct tst070wsbe_196c *to_tst070wsbe_196c(struct drm_panel *panel)
+{
+ return container_of_const(panel, struct tst070wsbe_196c, panel);
+}
+
+static void tst070wsbe_196c_reset(struct tst070wsbe_196c *ctx)
+{
+ gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+ msleep(200);
+ gpiod_set_value_cansleep(ctx->reset_gpio, 0);
+ msleep(20);
+}
+
+static int tst070wsbe_196c_prepare(struct drm_panel *panel)
+{
+ struct tst070wsbe_196c *ctx = to_tst070wsbe_196c(panel);
+ int ret;
+
+ ret = regulator_enable(ctx->supply);
+ if (ret < 0)
+ return ret;
+
+ msleep(20);
+
+ tst070wsbe_196c_reset(ctx);
+
+ return 0;
+}
+
+static int tst070wsbe_196c_unprepare(struct drm_panel *panel)
+{
+ struct tst070wsbe_196c *ctx = to_tst070wsbe_196c(panel);
+
+ gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+ regulator_disable(ctx->supply);
+
+ return 0;
+}
+
+static const struct drm_display_mode tst070wsbe_196c_mode = {
+ .clock = (1024 + 160 + 12 + 160) * (600 + 12 + 10 + 23) * 60 / 1000,
+ .hdisplay = 1024,
+ .hsync_start = 1024 + 160,
+ .hsync_end = 1024 + 160 + 12,
+ .htotal = 1024 + 160 + 12 + 160,
+ .vdisplay = 600,
+ .vsync_start = 600 + 12,
+ .vsync_end = 600 + 12 + 10,
+ .vtotal = 600 + 12 + 10 + 23,
+ .width_mm = 190,
+ .height_mm = 121,
+ .type = DRM_MODE_TYPE_DRIVER,
+};
+
+static int tst070wsbe_196c_get_modes(struct drm_panel *panel,
+ struct drm_connector *connector)
+{
+ return drm_connector_helper_get_modes_fixed(connector,
+ &tst070wsbe_196c_mode);
+}
+
+static const struct drm_panel_funcs tst070wsbe_196c_panel_funcs = {
+ .prepare = tst070wsbe_196c_prepare,
+ .unprepare = tst070wsbe_196c_unprepare,
+ .get_modes = tst070wsbe_196c_get_modes,
+};
+
+static int tst070wsbe_196c_probe(struct mipi_dsi_device *dsi)
+{
+ struct device *dev = &dsi->dev;
+ struct tst070wsbe_196c *ctx;
+ int ret;
+
+ ctx = devm_drm_panel_alloc(dev, struct tst070wsbe_196c, panel,
+ &tst070wsbe_196c_panel_funcs,
+ DRM_MODE_CONNECTOR_DSI);
+ if (IS_ERR(ctx))
+ return PTR_ERR(ctx);
+
+ ctx->supply = devm_regulator_get(dev, "power");
+ if (IS_ERR(ctx->supply))
+ return dev_err_probe(dev, PTR_ERR(ctx->supply),
+ "Failed to get power regulator\n");
+
+ ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(ctx->reset_gpio))
+ return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),
+ "Failed to get reset-gpios\n");
+
+ ctx->dsi = dsi;
+ mipi_dsi_set_drvdata(dsi, ctx);
+
+ dsi->lanes = 4;
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_LPM;
+
+ ctx->panel.prepare_prev_first = true;
+
+ ret = drm_panel_of_backlight(&ctx->panel);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to get backlight\n");
+
+ drm_panel_add(&ctx->panel);
+
+ ret = mipi_dsi_attach(dsi);
+ if (ret < 0) {
+ drm_panel_remove(&ctx->panel);
+ return dev_err_probe(dev, ret, "Failed to attach to DSI host\n");
+ }
+
+ return 0;
+}
+
+static void tst070wsbe_196c_remove(struct mipi_dsi_device *dsi)
+{
+ struct tst070wsbe_196c *ctx = mipi_dsi_get_drvdata(dsi);
+ int ret;
+
+ ret = mipi_dsi_detach(dsi);
+ if (ret < 0)
+ dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);
+
+ drm_panel_remove(&ctx->panel);
+}
+
+static const struct of_device_id tst070wsbe_196c_of_match[] = {
+ { .compatible = "tsd,tst070wsbe-196c" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, tst070wsbe_196c_of_match);
+
+static struct mipi_dsi_driver tst070wsbe_196c_driver = {
+ .probe = tst070wsbe_196c_probe,
+ .remove = tst070wsbe_196c_remove,
+ .driver = {
+ .name = "panel-tsd-tst070wsbe-196c",
+ .of_match_table = tst070wsbe_196c_of_match,
+ },
+};
+module_mipi_dsi_driver(tst070wsbe_196c_driver);
+
+MODULE_AUTHOR("William Bright <william.bright@xxxxxxxxxxx>");
+MODULE_DESCRIPTION("DRM driver for TSD TST070WSBE-196C 7\" MIPI-DSI panel");
+MODULE_LICENSE("GPL");
--
2.43.0